Although English is currently the international language of business, not every document or Internet screen is in English. To deal with this, you need quick and accurate translations to and from English.
There are translation services available that charge by the document. There are also programs that you can buy that give you the ability to translate to and from many languages.
Best of all, in my opinion, is the “freeware” software called Dicter (www.dicter.net). It provides translations to/from over 40 languages. It is very quick and provides an accurate translation, which is aided by its automatic detection of the original language. The output seems to be more smooth and idiomatic than many other programs, so it produces more than just a stilted, word-by-word translation.
